20. Under the action of a force a 2 kg body moves such that the position x as a function of
time is given by x=2t square
, where x is in metres and t and is in seconds. The work done by
the force in the first three seconds is
1) 144J
2) 72 J
3) 36 J
4) zero
t?
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Under the action of a force, a 2kg body moves such that its position x as a function of time is given by x=t33 where x is in metre and t in second
Explanation:
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